Sometimes the error is WRITE FPDMA instead of READ - but only sometimes.

It seems that the drives boots up with 6.0Gbs links and then gets degraded to 1.5Gbs when the errors appear.

My actions so far:
replaced cables
replaced ATC PSU
removed backplanes to directly attach the drive to SATA controller
replaced 2 out of 5 drives due to a different and real drive FAULT - the new drives showed the same message directly after plugging them in
That DID not solve the issues!

When I disable the SATA PM (which I enabled in rc.local for each port) the errors go away !? So it seems to be a power / wakeup related issue.

However I encountered 3 different errors like this one (only 3 in 12h):

The last errors are different because thy are UNC read errors, suggestion a failed read from the drive itsself and not a "communication" problem like all the other errors.
But in regard to the UNC errors the drive does not show reallocated or failed sectors - SMART info for each drive is in the attached TXT document.

Is the "resetting link" a known problem linux or WD REDs problem when PM for SATA is enabled?

Asrock suugested replacing the MB, but that was before I tried disabling the PM - so I am waiting for a new answer.
I am also waiting for WD support to answer me.

So here is my Question for the Pro's:

Is this:

A) A real hardware bug and I should replace either the driver OR the MB !?
B) A Linux Kernel bug related to SATA PM?
C) A drive issue/incompatibility and I should replace the drives with other brand?

I think I can ignore the UNC rad erros as long as I don't have any bad sectors - right?

"Well... lately this forum has become support for everything except omv" [...] "And is like someone is banning Google from their browsers"

Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.Upload Logfile via WebGUI/CLI
#openmediavault on freenode IRC | German & English | GMT+1
Absolutely no Support via PM!

I host parts of the omv-extras.org Repository, the OpenMediaVault Live Demo and the pre-built PXE Images. If you want you can take part and help covering the costs by having a look at my profile page.

"Well... lately this forum has become support for everything except omv" [...] "And is like someone is banning Google from their browsers"

Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.Upload Logfile via WebGUI/CLI
#openmediavault on freenode IRC | German & English | GMT+1
Absolutely no Support via PM!

I host parts of the omv-extras.org Repository, the OpenMediaVault Live Demo and the pre-built PXE Images. If you want you can take part and help covering the costs by having a look at my profile page.

Maybe the usage of this setting is very rare in combination with 24/7 drives? I don't even use spindown.

Greetings
David

"Well... lately this forum has become support for everything except omv" [...] "And is like someone is banning Google from their browsers"

Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.Upload Logfile via WebGUI/CLI
#openmediavault on freenode IRC | German & English | GMT+1
Absolutely no Support via PM!

I host parts of the omv-extras.org Repository, the OpenMediaVault Live Demo and the pre-built PXE Images. If you want you can take part and help covering the costs by having a look at my profile page.

Is your board still under 2 year warranty? I would check it... maybe get a large sata controller to crosscheck it.

Greetings
David

"Well... lately this forum has become support for everything except omv" [...] "And is like someone is banning Google from their browsers"

Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.Upload Logfile via WebGUI/CLI
#openmediavault on freenode IRC | German & English | GMT+1
Absolutely no Support via PM!

I host parts of the omv-extras.org Repository, the OpenMediaVault Live Demo and the pre-built PXE Images. If you want you can take part and help covering the costs by having a look at my profile page.

12 degrees more? I would doubt that a drive in the same environmeant with the similiar airflow would be that much hotter (even if 5k vs 7k drives!) if it isn't the top 12th hdd slot and is compared to the first slot...

Greetings
David

"Well... lately this forum has become support for everything except omv" [...] "And is like someone is banning Google from their browsers"

Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.Upload Logfile via WebGUI/CLI
#openmediavault on freenode IRC | German & English | GMT+1
Absolutely no Support via PM!

I host parts of the omv-extras.org Repository, the OpenMediaVault Live Demo and the pre-built PXE Images. If you want you can take part and help covering the costs by having a look at my profile page.

The numerous errors continued until ALL WD REDs left the chassis of my NAS. I am running the HGST NAS drives for 1,5 weeks and have not had any errors since. I ran WD Datalifeguard on all of them (1st zeroing then full self test) - the all tested fine with mostly 1 re-allocated sector (but that 1 doesn't explain the multitude of errors while accessing totally different files)

I brought the drives back for testing to my retailer and they also tested the drives without any errors. Though I had log files of my problem they where very kind and gave me a refund.

In the end it had to be an incompatibility between the WD RED firmware and either the SATA Chipset and/or the mainboard itsself - just a pain in the a** !!!!